PlumberCalc Reviews — Discover what people think of this product.

PlumberCalc.com is a free, mobile-friendly toolkit with 20+ professional-grade plumbing calculators designed to help plumbers, engineers, and contractors save time and improve accuracy on the job.

Built for real-world use in the field or the office, these calculators cover essential plumbing calculations including:

✅ Pipe Sizing based on flow rate and pipe length

✅ Water Flow Rate & Pressure Drop calculators

✅ Friction Loss and Drainage Slope calculations

✅ Fixture Unit Load and Expansion Tank Sizing

✅ Gas Line Sizing for natural gas and propane

✅ Water Heater & Septic System Sizing

✅ Hot Water Recirculation, Pump Head, BTU Heating Load, and more

New tools like the Plumbing Estimating Calculator and Water Hammer Calculator help streamline project planning and compliance with building codes.

🔧 All formulas follow industry standards (IPC, ASME) and use trusted equations like Hazen-Williams, Bernoulli’s, Manning’s, and Darcy-Weisbach.